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<p>The electrochemical performance of Li-rich Mn-based oxides (LMO) cathode materials is generally improved by constructing a micro-nano heterostructure. In the present work, a typical LMO of Li<sub>1.2</sub>Mn<sub>0.54</sub>Co<sub>0.13</sub>Ni<sub>0.13</sub>O<sub>2</sub> (LMCN), exhibiting a distinct spherical micro-nano heterostructure, is prepared by combining carbon-containing droplet combustion and air calcination methods. The analysis of morphology, structure, and electrochemical performance of LMCN indicates that the micro-nano structure of LMCN is composed of micron-sized spherical powder comprising nanoscale primary particles. At charging and discharging conditions of 0.2 C, the initial discharge specific capacity and columbic efficiency are estimated to be 262.048 mAh/g and 74%. Moreover, the developed LMCN cathode material has also exhibited high rate capability (with a discharge specific capacity of 75.174 mAh/g at 10 C), indicating its promising application prospect. CV and EIS results also confirm the improved electrochemical kinetics of LMCN evidenced by oxidation peaks at approximately 4.0 and 4.6&#xa0;V with low Rs of 6.1 Ω, and a small Rct of 200 Ω. Furthermore, the formation mechanism for the micro-nano structure of LMCN is also discussed in detail.</p>

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Construction of micro-nano structured Li-rich Mn-based cathode materials by combining carbon-containing droplet combustion and air calcination methods

  • 期刊论文

  • 发表日期：

    2026年4月14日

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  • Aimin Chu,
  • Ziyu Zhou,
  • Rafi Ud-Din,
  • Yuping Zhao,
  • Shibo Zhan,
  • Zhiming Chen,
  • Hairong Hu,
  • Youming Chen

摘要

The electrochemical performance of Li-rich Mn-based oxides (LMO) cathode materials is generally improved by constructing a micro-nano heterostructure. In the present work, a typical LMO of Li1.2Mn0.54Co0.13Ni0.13O2 (LMCN), exhibiting a distinct spherical micro-nano heterostructure, is prepared by combining carbon-containing droplet combustion and air calcination methods. The analysis of morphology, structure, and electrochemical performance of LMCN indicates that the micro-nano structure of LMCN is composed of micron-sized spherical powder comprising nanoscale primary particles. At charging and discharging conditions of 0.2 C, the initial discharge specific capacity and columbic efficiency are estimated to be 262.048 mAh/g and 74%. Moreover, the developed LMCN cathode material has also exhibited high rate capability (with a discharge specific capacity of 75.174 mAh/g at 10 C), indicating its promising application prospect. CV and EIS results also confirm the improved electrochemical kinetics of LMCN evidenced by oxidation peaks at approximately 4.0 and 4.6 V with low Rs of 6.1 Ω, and a small Rct of 200 Ω. Furthermore, the formation mechanism for the micro-nano structure of LMCN is also discussed in detail.